Machine adapted for the washing of dishes and other tableware



Dec. 10, 1929. J. LUTOLF 1,739,404

MACHINE ADAPTED FOR THE WASHING OF DISHES AND OTHER TABLEWARE File March1928 2 Sheets-Shee 1 J. LUTOLF ucnnm ADAPTED FOR Tris nsame 0F DISHES um0mm! TABLEWARE Filed mm; 26, 1928 2 sheets-Shea; 2

Patented Dec. 10, 1929 UNITED STATES PATENT OFFICE aosm' micron; onLUOERNE, swrrznnna vn MACHINE Arman non ran wnsnmo or msnns AND ornnn.TABLEWARE Application filed. larch 26, 1928, Serial No. 264,651, and inGermany March 28, 1927.

adapted to direct a shower of fluid down upon the dishes. Washingmachines of this type are very largely used in hotels, and possess averyhigh e ciency.

The primary object of my invention is to provide a dish washing machineof medium size which is especially adapted for hospitals, sanatoriumsand so on to wash, rinse and sterilize the dishes say of one floor ofthe building or some sick rooms of the hospitals.

Other and more specific objects of the invention are to provide a dishwashing machine of the type described which needs little space and whichmay be operated by hand and with but little experienced operators and 3by means of which a thorough cleaning and sterilizing of the dishesmaybe effected.

A further object of the invention resides in the provision,construction, arrangement and assemblage of the parts hereinafterspecifically-described whereby the machine as a whole is adapted to moreefliciently perform the functions required of it. I

In the. accompanying drawing the dish washing machine is shown by way ofan ex ample. Fig. 1 is a side elevation of'the dish washin machine partsbeing shown in section.

ig. 2 is an end view of the machine. Fig. 3 illustrates in sectionalelevation the means to reciprocate the tray.

Fig. 4 shows the valve of the spraying device with part of its sprayinggear.

Fig. 5 showsa detail of construction.

In the drawings 1 denotes a tank supported by legs and containing hotwater for washing the dishes. At the bottom a-discharge opening 3 isprovided which is closed by a hand operated valve body'2. In verticalguides 5 fixed to the side walls of the tank la horizontal platform 4adapted to receive stray tending across the vessel 20 and connected towith the dishes is slidably arranged. In downwardly projecting lugs ofthe platform 4 a shaft 10 is rotatably mounted. The shaft 10 isconnected to a crank arm 8 of shaft 7 by means of two links 9. The arm 8is rigidly connected to the shaft 7 which passes through stufling boxesin two opposite side walls of the tank 1. On one end of the shaft 7 ahand lever Sis fixed, and to theother end ofshaft 7 a short crank arm 11is attached. The arm 11 is linked to the arm 13 of a double armed lever13 by means of a rod 12. The double armed lever is pivoted at 15. On thesecond arm 14 a weight 16 is adjustably mounted. The platform 4 and thetray with the dishes (not shown in the drawings) is counterbalanced bythe weight 16 and may be raised and lowered by rocking the shaft 7 bymeans of lever 6. The dishes by being moved up and down in the water oftank 1 are cleaned in the well known manner.

To the side wall of the tank 1 a hollow bracket 21 is fastened whichsupports a vessel 20 adapted to receive a tray with the dishes. Thevessel 20 is provided with two sliding doors 22, 23, running in verticalguide rails 24, arranged at opposite walls of the vessel 20. Each door22, 23 is provided with a horizontal slot 26 at its upper end. A stud27, arranged at the end of an arm 28 engages said slot 26. The arms 28are rigidly connected to a shaft 29 which-is journalled in bearingsfastened to the guide rails 24. By means of a handlever 30 keyed toshaft 29 the sliding doors'22, 23 may be simultaneously raisedand'lowered to permit the operator to introduce a tray in vessel 20 orto remove it therefrom. In the upper portion of vessel 20 spraying pipes38 are arranged exanother set of spraying pipes 39 arranged within thehollow bracket 21 below the vessel 20.. The pipes 38, 39 are connectedby means of a valve '36 to a supply-pipe 37. The valve body 35 is linkedto a double armed lever 34 pivoted to a rail 24. Lever 34 is connectedby a rod 32 to an arm 31 rigidly fixed to shaft 29. A coiled spring 33attached with one end to said lever 34 and with the other end to a rail24 tends to close the valve 33.

7 45 on to the dishes,

for said door and said valve arranged to open the valve when the door isclosed and vice versa, and means also actuated by said common operatingmeans to hermetically secure the door in closed position.

' In testimony whereof I aifix my signature.

JosEF LUTOLF.

10 sprayed on the dishes from above and from below by the spraying pipes38, 39. To close the vessel 20 hermetically, cams 40 are rotatablymounted in lugs 41 of the side wall of chamber 20, each cam 40 beingprovided with a handle 42. Moreover the cams are interconnected by a rod43. To operate the cams 40 arms 44 are rigidly fixed to the shaft 29which arms 44 enter in engagement with the rods 43 after the slidingdoors 22, 23 have been brought into their closing position. The cams 40are returned to the initial position by springs 45 fixed with one'end tothe vessel 20 and with the other end to the cams. By lifting the doors22, 23 the arms44 are brought out of the engagement with the rods 43,and the latter are turned by the springs 45 leaving the doors 22,23 freeto follow the arms 28.

The dishes to be cleaned are arranged in a tray which is put on theplatform 4. By reciprocating thehand lever 6 the tray is moved up anddown the water passing between the dishes takes off the fat etc. Thetray is then introduced in the chamber 20. The hand 3 lever 30 ispressed down and the arms 28 move the sliding doors 22, 23 downward. Assoon as they have assumed their lowermost 7 position, the arms 44 turnthe cams which press the sliding doors 22, 23 on to the faces 49 ofchamber 20. B pressing down lever 30 the valve 36 has een opened andrinsing water is sprayed on the dishes in the tray.

By turning the three way valve the rinsing,

water supply is cut-ofi and steam is projected the latter beingsterilized thereby.

While I hav 'e disclosed a referred embodiment of my invention, I 0 notwish to be limited to the exact details of construction 50 andarrangement shown and described as it is my intention to make suchchanges in the construction, arran ement and combination of parts as Imay esire,-providing that the same come withi'nthe scope of the appended55 claim and do not depart from the spirit of the invention.

What I wish to secure by U. S."Letters Patent is In a washing'machine ofthe class described, a vessel'for the reception of articles to be washedand provided with a vertically movable door forming one side thereof'andalso. with means to supply steam or water to said vessel and a valve tocontrol the supply 65 of steam or water, common operating means

